I recommend you to perform a check in the Page Load event and if a directory does not exists then clear the paths set to RadFileExplorer and then set only the ones that really exists. :
- You can clear the RadFileExplorer's pats by clearing the TreeView's nodes. This will cause the new paths (set in the next step) to be populated:
- Then set the paths again, avoiding the incorrect ones
- Show a message to the client using Scriptmanager.RegisterStartupScrip method
I hope this helps.
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